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One Blackfriars, London, United Kingdom

Friday 20 Feb 2015
 

Record-breaking concrete pour at One Blackfriars

 
One Blackfriars by St George in London, United Kingdom
St George 
 
One Blackfriars by St George in London, United Kingdom One Blackfriars by St George in London, United Kingdom
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The largest concrete pour completed in a continuous 24-hour period marks a significant milestone in the construction of One Blackfriars  

Residential developer, St George, has recently celebrated a significant milestone in the construction of One Blackfriars after they completed a mind-bogglingly huge concrete pour, which took place over a continuous 24-hour period. Once completed in spring 2018, the iconic tower will stand at 50 storeys high and encompass approximately 57,000 tonnes of concrete structure, providing 274 new homes, a boutique-style hotel, landscaped piazza and retail and food outlets.

The concrete, delivered by a fleet of 400 trucks, covered an area of 3,200 m3. The newly-formed raft slab will carry the weight of the full concrete structure, distributing the weight evenly across 36 large diameter bearing piles. It is estimated that the concrete will take 56 days to achieve its specified target strength.

The overnight pour, brought forward a week to avoid disruption to a nearby hotel over Valentine’s weekend, filled an excavated hole 18m deep, resulting in a raft slab up to 4.5m thick. This concrete slab will provide the stability for the 170m-high tower in the face of wind resistance, creating an internal lever arm across its base and providing a large mass to anchor the form.

The soaring, asymmetrical design of the building was created by Ian Simpson Architects and features a dynamic double envelope façade with two distinct layers. This double-skin helps fresh air to circulate, reducing the need for further cooling systems and giving the building an unusual curved form, adding an impressive new silhouette to the London skyline. 

Michael Bryn-Jones, Managing Director of St George South London, said: “We are delighted with the ongoing building progress at One Blackfriars. The vast concrete pour marks a significant milestone in the construction of the tower and it is thrilling to see a record-breaking pour conducted at a St George site. Work will now commence apace and Londoners will be able to watch as One Blackfriars begins to take shape on the city skyline.”   

St George

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